of the benghazi consulate and annex where u.s. ambassador chris stevens and three other americans were murdered, a turkish broadcaster announced the arrest of two tunisians and called them suspect in the case. u.s. officials swiftly contacted them and they had no report on the action, they had an explanation why the fbi took so long to visit the so-called crime scene. >> we were working with the government of libya to obtain permission for the fbi team and the dod support team to travel there. we did seek over flight for them permission as well as for landing of aircraft and we worked to get them the appropriate visas, so we've been working through all of these perm metations. >> that the perpetrators may have different nationalities or fled to far-flung countries exposes the myriad difficulties the fbi faces in hunting down the killers. >> and the intelligence operation and the way in which globalization helps because we can check passports more quickly, we can figure out which may be fraudulent and which may be associated with suspect terrorists. >> the state department panel led by former u.